– Sir, we have failed to work out this problem. What is exactly the right way?

--- Look. Only in this way ________ , but you boys _____ a wrong way.

--- Sir, we have failed to work out this problem. What is exactly the right way?
--- Look. Only in this way ______ , but you boys ______ a wrong way.

1. A.
   you can work it out; take
2. B.
   you can work out it; take
3. C.
   can you work it out; take
4. D.
   can you work it out; took

  – Sir, we have failed to work out this problem. What is exactly the right way?

--- Look. Only in this way ________ , but you boys _____ a wrong way.

A. you can work it out; take            B. you can work out it; take

C. can you work it out; take            D. can you work it out; took

  – Sir, we have failed to work out this problem. What is exactly the right way?
--- Look. Only in this way ________ , but you boys _____ a wrong way.